calcium oxalate n a colorless crystalline salt CaC2O4·H2O that is noted for its insolubility and is sometimes excreted in urine or retained in the form of urinary calculi
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CaC2O4, a salt of oxalic acid which, when formed in high concentrations in the urine, may lead to formation of an oxalate calculus (see under calculus). Natural forms include weddellite and whewellite.Medical dictionary. 2011.